using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;

namespace Neo.Afx.Collections
{
    /// <summary>
    /// A collection of int values that map to month name string values.
    /// </summary>
    public class MonthCollection : ReadOnlyCollection<KeyValuePair<int, string>>
    {
        /// <summary>
        /// Initializes a new instance of the <see cref="MonthCollection"/> class.
        /// </summary>
        public MonthCollection()
            : base(CreateList())
        {
        }

        static List<KeyValuePair<int, string>> CreateList()
        {
            // monthNames contains 13 elements
            var monthNames = DateTimeFormatInfo.InvariantInfo.AbbreviatedMonthNames;

            var options = new List<KeyValuePair<int, string>>();
            for(var i = 0; i < monthNames.Length - 1; i++)
            {
                options.Add(new KeyValuePair<int, string>(i + 1, monthNames[i]));
            }
            return options;
        }

    }
}